Knife-sharpener



(No Model.) F. J. REINEOLD.

` KNIFE SHARPBNBR. y Nm 343,852. Patented June 15, 1886.

WITNESSES f INVENTOR mf@- fw? Aztarney N. PETERS, Fhowulhegmphnr.washingion, D. c.

UNITED STATES PATENT EEIcE.

FRANK J. EEINIIOLD, or DETROIT, MICHIGAN.

KNIFE-SHARPENER.

SPECIFICATION forming part of Letters Patent NO. 343,852, dated June 15,18186.

Application filed June 6, 1885. Serial No. 167,869. (No model.)

To all whom it may concern:

Be it known that I, FRANK J. REINrIoLD, of Detroit, county of Vayne,State of Michigan, have invented a new and useful Improve ment inKnife-Sharpeners; and I do declare the following to be a full, clear,and exact description of the invention, such as will e11- able othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which form a part of thisspecification.

lVIy invention relates to improvements in knife-Sharpeners; and itconsists, essentially, of two metallic sharpening-rolls supported in asuitable frame, said rolls having a yielding connection in the supportand provided with means for partially revolving the same at eachengagement of the knife with said rollers to present a fresh surface tothe knife, as more particularly hereinafter described, and pointed outin the claims.

In the drawings, Figure l is a transverse section of a device embodyingmy invention. Fig. 2 is a vertical section along the line a: y. Fig. 3is a horizontal section. Fig. 4l represent-s a modification of thedevice. Fig. 5 is an end elevation of the same,partly in section.

I carry out my invention as follows:

A represents any suitable support.

BBrepresentsharpening-rollers. Asshown, the rollers have a lateralyielding engagement with the frame. For this purpose the frame or casemaybe provided with elongated slots or bearings for the journals b b ofsaid rollers, the construction being such that when the knife isinserted between the two and comes in contact with their surfaces theforce applied to the knife will at once spread the rolls a littlefarther apart, the distance, however, to which they are permitted toyield being controlled by the limit of the elongated slots or bearings,as when the journals have reached the outer extremities of said slotsthey come to a firm engagement and prevent a further yielding of therollers, and the operation of sharpening the blade is effected.

C C represent springs bearing against the outer periphery of saidrollers, respectively, the effect of the spring being to give a partialrevolution to the rollers upon their return to normal position when theblade is removed, and thus presents a fresh surface for the nextengagement of the knife. I do not limit myself, however, to this precisemethod of engaging the sharpeningrollers in the case or frame, as myinvention contemplates,broadly, the yielding engagement of the rollersin the case in any desired manner by which a p artial revolution of thesaine will be accomplished at or after the engagement of the bladetherewith, and for this purpose the method of engagement shown in Fig. 4may be employed, if desired, in which the rollers are engagedin the casewithoutjournals in such a manner that the rollers may yield laterallyand be returned to their normal positions by the springs, as beforedescribed. In this case additional rollers, E E, may be provided,bearing against the sharpening-rollers in such a manner as to cause africtional contact and partial rotation of the sharpening-rollers asthey are caused to yield laterally by the engagement of the bladetherewith and as they are returned to their normal position by thesprings.

The construction shown in Fig. 4 can be made as economically as thoughthe shafts were employed, the friction-rolls E E being simply theequivalent in expense of the shafts employed, as shown in Fig. l.

The springs not only serve to return the sharpening-rollers to theirnormal position, but serve also to scrape the periphery of the rollersand clear them of grit.

That I claim is- 1. In a 4knife-Sharpener, the combination, with aninclosing-case, of sharpeningrollers mounted therein, one or more ofsaid rollers having ayielding engagement in the case, substantially asdescribed.

2. In a knife-Sharpener, the combination, with a case, -of twosharpening-rollers having a lateral yielding engagement therewith and aspring acting upon said rollers to restore them to normal position andcause the rotation of said rolls, substantially as described.

3. The combination, with a case, of sharpening-rollers provided withelongated bearings and springs acting upon said rollers, theconstruction being such that when the blade is engaged with the rollersthey may yield to IOO a limited extent and be restored to normaltherewith, friction-rolls EE', located adjacent position when the bladeis removed, said rollto said-sharpening-rollers, and springs acting ersbeing partially rotated by said operation, upon said sharpeningrollers,substantially as substantially as described. and for the purposedescribed. 15 5 4. The combination, with a case, of-sharp.- In testimonywhereof I sign this specifica- ,ellliing-rollers haing a yieldinlgrengagemen tion in the presence of two Witnesses.

t erewith, and riction-rolls E, engage therewith, substantially as andfor the pur- FRANK J' REINHOLD'.

pose described. Witnesses: 1o 5. The combination, with a case, ofsbarlo- N. S. WRIGHT,

ening-rollers having a yielding engagement M. B. ODOGHERTY.

